Analysis and Design of Closed Loop Manufacturing Systems.

摘要

This thesis introduces an approximation method for evaluating the performance of closed loop manufacturing systems with unreliable machines and finite buffers. The method involves transforming an arbitrary loop into one without thresholds and then evaluating the transformed loop using a new set of decomposition equations. It is more accurate than existing methods and is effective for a wider range of cases. The convergence reliability, and speed of the method are also discussed. In addition, observations are made on the behavior of closed loop systems under various conditions. Finally, the method is used in a case study to determine the in-process inventory required to meet a specified production rate for a system operating according to a CONWIP control policy.